Duty cycle adjustable: zero. - PWM Duty Cycle: 0% -100%.
zalati 2pcs PWM Motor Speed Controller DC 1.8V 3V 5V 6V 12V 2A 1803BK Adjustable Speed Controller Low Voltage Control Module Controller with Button
RUNCCI-YUN 2pcs DC 12v PWM motor speed controller,1.8V 3V 5V 6V 12V 2A Speed Adjustable Switch Module, Variable Voltage Regulator Dimmer Governor Switching Build with LED Indicator and Switch Function
Low Voltage DC PWM Motor Speed Controller Module 1.8V 3V-5V-6V 12V 2A 1803BK